I have just removed my 2bbl inlet and carb from my 326 67 Firebird covertible and replaced it with a second hand duel plane Edelbrock intake and 4bbl carb I got for a very resonable price on Ebay in the UK.
I have an air pump on my car so I presume it's a California model. I have removed the pump but I didn't have anything to block the hole in the end of the heads so for now I left the two pipes on there and block the top pipe where the two pipes join and it was sucking a vacuum through there. I fitted a shorter V belt to go from the fan pully to the altenator I have another belt in front that goes from the fan pully to the power steering.
What do I need to block the holes? Will a freeze plug set like this have the right size plugs?
67 Firebird 350, TH350 auto Convertible, B&M 3000 TC, 4bbl Edelbrock Performer carb and intake Black Jack headers,disc brake conversion. 10 bolt chevy axle with 3.73's and B&M Rachet shifter.